A leading Labour MP has refused to say he'd prefer Jeremy Corbyn to Theresa May as Prime Minister should the Government suffer defeat on its crucial Brexit trade bill.

Stephen Kinnock spoke to Julia Hartley-Brewer ahead of Corbyn's headline speech today, which argues that Britain should remain part of a customs union after Brexit. This stance means Labour could back amendments to Theresa May's flagship trade bill, tabled by Tory MPs Anna Soubry and Ken Clarke, which demand that Britain retain its current customs arrangements with the EU.

Kinnock said Corbyn's stance is a "step in the right direction" and praised the Labour leader for mapping out a definitive policy.

However the conversation then turned to whether Kinnock would back a Corbyn government should Parliament back Soubry's amendment to the trade bill - which is tipped to return to Parliament after Easter. May continues to ignore demands for future customs union membership and the amendment could become a confidence issue for her administration.

"My honest view is that the Brexit crisis transcends party politics at the moment," Kinnock said, adding that Soubry's amendment "doesn't necessarily have to trigger the fall of the Government."